Education & Reference
StringScales
Last updated 2026-07-31 · benchmark measured 2026-07-31 — deterministic & reproducible
Interactive fretboard tool that lights up scales over a live backing band as you practice chord progressions.
Is StringScales production-ready?
Legit.Show ran its deterministic 7-Frame production-readiness benchmark on StringScales (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Security; its weakest is Accessibility. The per-frame breakdown is public on the Legit.Show listing; the single overall production-readiness score is reserved for the verified maker.
The 7 Frames
- Performance — 96/100
- Accessibility — 93/100
- Security — 100/100
- Privacy — 100/100
- Reliability — 100/100
- Standards — 94/100
- Discoverability — 100/100
What we measured
- Security headers present: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 497 ms to first byte.
- Returns a proper 404 for unknown routes.
- 3 of 3 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
- Discoverable: structured data, sitemap, OpenGraph image, canonical URL.
Who built it
Kevin
Who it's for
Guitar and bass players · Scale learners · Musicians practicing improvisation · Visual learners · Stringed instrument players
Pricing
Completely free, no account required